zerodrop

Email verification infrastructure for CI pipelines and AI agents.

Send a verification email. Catch it at the edge. Get email.otp and email.magic_link back — auto-extracted, no regex, no Docker, no signup.

email = mail.wait_for_latest(inbox)

email.otp        # "123456" — auto-extracted
email.magic_link # "https://..." — no regex needed

Documentation · GitHub · Status

Install

pip install zerodrop

No dependencies. Python 3.8+.

Zero-Auth Mode (Local Development)

from zerodrop import ZeroDrop

mail = ZeroDrop()
inbox = mail.generate_inbox()
# → "swift-x7k29@zerodrop-sandbox.online"

email = mail.wait_for_latest(inbox, timeout=10000)
print(email.subject)     # "Reset your password"
print(email.otp)         # "123456" — auto-extracted, no regex needed
print(email.magic_link)  # "https://..." — auto-extracted verification link

Free API Key (Private Inboxes)

Without a key, anyone who knows an inbox's name can read it. With a free key, your inboxes start with your own prefix and only your key can read them.

1. Sign in with GitHub at zerodrop.dev/keys and create a key.
2. Set it as ZERODROP_API_KEY. The client reads it automatically, or you can pass api_key=.

mail = ZeroDrop()                  # reads ZERODROP_API_KEY when it's set
inbox = mail.generate_inbox()
# → "k7x2-swift-x7k29ab@zerodrop-sandbox.online", where k7x2 is your prefix

Reading a k7x2-… inbox without your key raises ZeroDropAuthError with the reason. mail.prefix holds your prefix if you build an address yourself. A key holding a character that can't be sent in an HTTP header (a line break, say) makes ZeroDrop() raise ValueError; the message never includes the key.

CI Pipeline Mode (pytest)

from zerodrop import ZeroDrop

mail = ZeroDrop(api_key=os.environ.get("ZERODROP_API_KEY"))

def test_password_reset(page):
    inbox = mail.generate_inbox()

    page.goto("/forgot-password")
    page.fill('[name="email"]', inbox)
    page.click('[type="submit"]')

    email = mail.wait_for_latest(inbox, timeout=15000)
    assert "Reset your password" in email.subject

    # No regex — magic_link is auto-extracted at the edge
    page.goto(email.magic_link)
    assert page.url == "/dashboard"

Email Filtering

Filter emails by sender, subject, body, or extracted fields:

from zerodrop import ZeroDrop, ZeroDropFilter

mail = ZeroDrop()

# Only match emails from a specific sender
email = mail.wait_for_latest(inbox, filter_=ZeroDropFilter(
    from_="noreply@yourapp.com"
))

# Only match emails with an OTP
email = mail.wait_for_latest(inbox, filter_=ZeroDropFilter(
    has_otp=True
))

# Combine filters
email = mail.wait_for_latest(inbox, timeout=15000, filter_=ZeroDropFilter(
    from_="noreply@yourapp.com",
    subject="Verify",
    has_magic_link=True
))

All string filters are case-insensitive partial matches.

OTP Auto-Extraction

ZeroDrop extracts OTP codes and magic links at the edge before emails reach your test suite. No regex required.

email = mail.wait_for_latest(inbox)

email.otp        # "123456" — 4-8 digit verification code
email.magic_link # "https://app.com/verify?token=abc" — verification/reset link
email.body       # Full plain-text body (if you need it)

Both fields are None if not detected in the email.

Parallel CI Runs

generate_inbox() runs locally — no network request, no throttling:

# Safe to run in parallel — generate_inbox() is local
inboxes = [mail.generate_inbox() for _ in range(50)]

API

ZeroDrop(api_key=None, base_url=BASE_URL)

• api_key — optional. Defaults to the ZERODROP_API_KEY environment variable. Without a key, inboxes are public to anyone who knows the name.
• base_url — override the API base URL.

mail.generate_inbox() -> str

Returns a ready-to-use email address instantly. No network request. With a key, the name starts with your prefix.

mail.prefix -> Optional[str]

Your key's inbox prefix ("k7x2"), or None without a key.

mail.fetch_latest(inbox, filter_=None) -> Optional[ZeroDropEmail]

Returns the latest email or None if inbox is empty.

mail.wait_for_latest(inbox, timeout=10000, poll_interval=2.0, filter_=None) -> ZeroDropEmail

Polls until an email arrives. Raises ZeroDropTimeoutError on timeout.

• timeout — milliseconds to wait (default: 10000)
• poll_interval — seconds between polls (default: 2.0)
• filter_ — optional ZeroDropFilter instance

mail.on_received(inbox, webhook_url) -> dict

Registers a webhook. Requires API key (Workspace tier).

Types

@dataclass
class ZeroDropEmail:
    id: str
    from_: str
    to: str
    subject: str
    body: str
    raw_body: str
    received_at: datetime
    otp: Optional[str]        # Auto-extracted OTP code (4-8 digits)
    magic_link: Optional[str] # Auto-extracted verification/reset link

@dataclass
class ZeroDropFilter:
    from_: Optional[str] = None        # Partial match on sender address
    subject: Optional[str] = None      # Partial match on subject line
    body: Optional[str] = None         # Partial match on email body
    has_otp: Optional[bool] = None     # Only match emails with an OTP
    has_magic_link: Optional[bool] = None  # Only match emails with a magic link

Error Handling

from zerodrop import ZeroDrop, ZeroDropTimeoutError

try:
    email = mail.wait_for_latest(inbox, timeout=10000)
except ZeroDropTimeoutError:
    print("No email received — check your app is sending correctly")

Free vs Workspace

	Free	Workspace
Inbox generation	✓	✓
OTP auto-extraction	✓	✓
Magic link extraction	✓	✓
Email filtering	✓	✓
Email retention	30 min	Extended
Custom domains	✗	✓
API key	✓ free at zerodrop.dev/keys	✓
Webhooks	✗	✓

Get a Workspace at zerodrop.dev

License

MIT